20421214192 has 40 divisors (see below), whose sum is σ = 39778704000. Its totient is φ = 10155832512.

The previous prime is 20421214189. The next prime is 20421214213. The reversal of 20421214192 is 29141212402.

It is a self number, because there is not a number n which added to its sum of digits gives 20421214192.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5079159 + ... + 5083177.

It is an arithmetic number, because the mean of its divisors is an integer number (994467600).

Almost surely, 2^20421214192 is an apocalyptic number.

It is an amenable number.

20421214192 is a deficient number, since it is larger than the sum of its proper divisors (19357489808).

20421214192 is a wasteful number, since it uses less digits than its factorization.

20421214192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653 (or 5647 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 20421214192 its reverse (29141212402), we get a palindrome (49562426594).

The spelling of 20421214192 in words is "twenty billion, four hundred twenty-one million, two hundred fourteen thousand, one hundred ninety-two".